25-hydroxyvitamin D, total — lab reference
In the reference guide<10 severe deficiency; 10-19 mild-moderate deficiency. Toxicity assessment requires clinical context.
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What’s searchable?<10 severe deficiency; 10-19 mild-moderate deficiency. Toxicity assessment requires clinical context.
Not a routine vitamin D status test. Interpret with calcium, phosphorus, kidney function, and PTH.
Correct for albumin when appropriate or measure ionized calcium.
Fasting, Gilbert syndrome, hemolysis, and liver disease may alter result.
Review albumin, globulin, and electrophoresis when indicated.
Screening measure, not a stand-alone treatment target.
Affected by thyroid-binding globulin, pregnancy, estrogen, and medications.
Affected by binding proteins and nonthyroidal illness.
Interpret with iron, transferrin saturation, and ferritin.
No universal wellness target. Interpret with B12, folate, B6, kidney, thyroid, genetics, and medications.
Age-adjusted and assay-specific diagnostic strategies may apply. Not a stand-alone thrombosis diagnosis.
Morning collection preferred for men. Method and age matter; confirm unexpected low values.
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